In this Nov. 3, 2015 file photo, the Keystone Steele City pumping station, into which the planned Keystone XL pipeline is to connect to, is seen in Steele City, Nebraska. (THE CANADIAN PRESS/AP/Nati Harnik, File)

It was rejected by former President Barack Obama in 2015. That decision was reversed in 2017 by President Donald Trump, who has promoted the $8 billion project as part of his effort to boost American energy industries.

After environmental groups sued, Morris said the administration had not fully considered potential oil spills and other impacts and that further reviews were needed.